Stability of cyclically symmetric strained pumpkin balloons and the formation of undesired equilibria

被引：0

作者：

Baginski, Frank ^{[1
,3
]}

Brakke, Kenneth A. ^{[2
]}

Schur, Willi W. ^{[2
,3
,4
]}

机构：

[1] George Washington University, Washington, DC 20052, United States

[2] Susquehanna University, Selinsgrove, PA 17870, United States

[3] AIAA, United States

[4] P. O. Box 698, Accomac, VA 23301, United States

来源：

Journal of Aircraft | 1600年 / 43卷 / 05期

关键词：

NASA's effort to develop a large payload; high altitude; long-duration balloon; the ultralong duration balloon; focuses on a pumpkin shape superpressure design. It has been observed that a pumpkin balloon may be unable to pressurize into the desired cyclically symmetric equilibrium configuration; settling into a distorted; undesired state instead. Hoop stress considerations in the pumpkin design lead to choosing the lowest possible bulge radius; whereas robust deployment is favored by a large bulge radius. Mechanical locking may be a contributing factor in the formation of undesired equilibria. Long term success of the pumpkin balloon for NASA requires a thorough understanding of the phenomenon of multiple stable equilibria. This paper uses the notion of stability to classify balloon designs. When we applied our finite element model to a balloon based on the NASA Phase IV-A pumpkin design; we found the fully inflated/fully deployed strained equilibrium float configuration was unstable. To demonstrate our approach for exploring the stability of constant bulge radius designs and their sensitivity to parameter changes we carry out a number of parametric studies. We focus on analytical studies; but we also compare our results with flight data whenever possible. Copyright © 2006 by the American Institute of Aeronautics andAstronautics; Inc. All rights reserved;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Journal article (JA)

引用

页码：1414 / 1423